16. c4d5  16... e7d6  17. d3c2 It's hard to break Black's position, but White can try for a long time without much risk (although in a blitz game there is always some risk). The plan is to push f2-f4 at the right moment. 17... d8c7  18. e3g5 I don't like this move, as I don't see how it helps White's plan.